Environmental Control Library

Modelon’s Environmental Control Library is a Modelica library for aircraft environmental control systems analysis and design. The library is designed to study energy consumption and thermal conditions that affect the level of comfort for passengers and crew.

These performance aspects are driven by large variations in ambient conditions such as humidity and temperature. The models provided by Environmental Control Library account for these effects through first principles and fully support bidirectional flow.

The library has been developed internally at Modelon for a number of years together with a European airframer, and starting with version 3.1 it is publicly available. Modelon is now able to offer out of the box a library reinforced through industrial collaboration deployment.

Online visualization of simulation results for intuitive understanding of the system behavior

Configurable model fidelity for faster simulation and right complexity level.

Air conditioning performance assessment.
The bleed air from the engine is directed to the primary heat exchanger where it is cooled with ambient ram air. The air is then compressed and cooled down further in the main or secondary heat exchanger. A high pressure water separation loop allows for the extraction of free moisture.

The Environmental Control Library is being used successfully by industry in system performance assessment and control system design.

The models are used to verify how the resulting system robustly delivers air conditioning and auxiliary cooling to all aircraft thermal loads.

Applications include:

Design and assessment of bleed and bleedless architectures

Control system verification

Full vehicle thermal management

Verification of critical components – is sufficient moisture extracted in the high pressure water separation loop.

”For environmental control systems and fuel systems, SAAB has together with Modelon developed libraries
[that are] commercially available.

Ingela Lind and Henric Andersson
, SAAB Aeronautics

About us

Modelon provides software solutions and expert services to organizations that use model-based simulation tools to design and develop technical systems. Modelon’s libraries, solver, and deployment solutions are leading products available in the market today for modeling, simulation and optimization. Our products enable companies to focus on delivering a unified picture of product system interaction and performance – from product concept to operation.